Grinding-machine.



No. 891,902. PATENTED JUNE 30, 1908. w. A. BOND.

GRINDING MACHINE.

APPLICATION FILED 0OT.3 L 1907.

, UNITED STATES PATENT OFFICE.

WILLIAM A. BOND, OF LYNNFIELD, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHIN- ERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OI NEWJERSEY.

GRINDIN G-MACHINE To all whom it may concern:

Be it known that I, WILLIAM A. BOND, a citizen of the United States,residing at Lynnfield, in the county of Essex and CommonwealthoflVIassachusetts, have invented certain Im rovements inGrinding-Machines, of which t e following description, in connectionwith the accompanying drawings, is a specification, like referencecharacters on the drawings indicating like parts in the several figures.

This invention relates to grinding machines and has for its object toimprove the construction and arrangement of machines of this class.

In carrying out the present invention I employ a carrier, upon. whichthe knives or other tools to be ground are supported, and. a suitablegrinding device. The carrier is mounted for movement across the actingsurface of the grinding device and for movement to and from operativerelation with said device in order that the knives supported upon thecarrier may be brought in contact with the grinding surface and thenmoved back and forth over said surface in the grinding operation.

In the illustrated embodiment of the invention, movement is imparted tothe carrier across the acting surface of the grinding device and to andfrom operative relation with said device through the agency of a rodwhich is mounted for sliding and turning movement in a guideway whichsupports the carrier. The rod is provided with an up wardly extendingarm which engages the carrier in such'manner that by oscillating the rodthe carrier is reciprocated across the face of the grinding device andthe arrangement is such that the carrier may be moved to and fromoperative relation with the grinding device by sliding the rod to andfro in the guideway.

Other features of the invention will be hereinafter described anddefined in the claims.

In the drawing, the figure is a view in perspective of a preferredembodiment of my invention.

A suitable base 2 is provided upon which are supported journals 4 whichform bearings for a shaft carrying the pulley 6 and grinding Wheel 8. Ashield 10 supported in any suitable way upon the base is preferablyprovided for the grinding wheel and a water sup Specification of LettersPatent.

Application filed October 31, 1907.

Patented June 30, 1908.

Serial No. 400,136.

plying device comprising a receptacle 12 and a tube 14 arranged todeliver water to the grinding wheel is also provided as is common inthis art.

A plate 3 is adjustably mounted for move- 60 ment toward and from thegrinding device upon the base 2 and a bolt 5, extending through theplate 3 and a slot,not illustrated, in the base 2 is arranged to securethe plate 3 in different adjustments. Rigidly secured 5 to the plate 3is a guideway 16 comprising a horizontal plate with a trough-shapeddepression 18 intermediate its sides. A flat plate 20 constituting acarrier for tool holders hereinafter described is mounted upon theguideway 16 for sliding movement longi tudinally and transverselythereof and is provided with marginal flanges 22 which project over thesides of said guideway and are spaced a sufficient distance apart topermit the carrier to have a limited sliding movement transversely ofthe guideway, as clearly shown in the drawing. Two retaining plates 24are secured to the flanges 22 on the underside of the carrier in orderto prevent upward displacement of the carrier. A removable pin 26,extending through the carrier and working in a slot formed in theguideway 16, serves to limit the outward sliding movement of thecarrier. A rod 28 having a hand wheel secured on its outer end ismounted for sliding and turning mow-uncut in a groove formed in thebottom of the depression 18 and is provided with an upwardly extendingarm 30 which carries a forked member arranged to engage a pin 32 securedin lugs 34 depeni'ling from the carrier and spaced to engage the ends ofthe forked member.

The blade holders are detachably mounted upon supports 36 arranged uponopposite sides of the grinding device and rigidly secured to the carrier20, and in the present embodiment of the invention two holders arearranged for use simultaneously to support knives in operative relationwith the acting face of the grinding surface.

The blade holders each comprise an inclined base plate 31 having anupwardly extending projection at its lower end for engaging the side ofa knife positioned in the holder, and the said projection has a flangearranged to overlap the upper side of said knife, as clearly shown inthe drawing. Clamping plates are arranged to hold the knives inengagement with the base plates and are provided with dependingshoulders 37 to hold the knives in engagement with the upwardlyextending projections on the base plates. The clamping plates 85 aresecured for longitudinal adjustment along the base plates by means ofmilled headed screws which extend through longitudinal slots in saidclamping plates into the base plates, and guiding means are provided formaintaining the clamping plates in parallel relationship with the baseplates, and this arrangement permits knives of different sizes to beheld in the blade holders.

In the operation of the machine, the knives are inserted in suitableposition in each holder and the carrier is moved inwardly by means ofthe hand wheel until the edges of the knives are in engagement with theacting surface of the grinding device, and then by oscillating the handwheel said edges are moved back and forth over the grindstone and evenlyground to a sharp edge. It will be observed that as the grinding wheeldecreases in size through continued wear the plate 3 may be adjustedinwardly upon the base plate 2 so as to bring the carrier and bladeholders in suitable proximity to the grinding surface, and with thisarrangement the guideway may be made shorter in length than wouldotherwise be the case, which is advantageous in securing an inexpensiveand compact .construction. It will also be seen that the carrier 20serves to cover the devices provided to support and to impart movementthereto.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is 1. A grinding machine, havingin combination, a grinding device, a movable carrier for the tools to beground, a rod mounted for turning and sliding movement, and meanscarried by said rod for imparting reciprocating movement to said carrieracross the acting face of the grinding device and sliding movement toand from operative relation with said acting face.

2. A grinding machine, having in combination, a grinding device, aguideway, a carrier for the tools to be ground mounted upon saidguideway for movement longitudinal and transverse thereof, a rodarranged for turning and sliding movement on said guideway, and meanscarried by said rod arranged to impart reciprocating movement to saidcarrier across the acting face of said grinding device, said meansconstructed to impart sliding movement to said carrier to and fromoperative relation with said acting face.

3. A grinding machine, having in combination, a rotary grinding device,a guideway, a carrier for the tools to be ground mounted for movementupon said guideway, and means for moving said carrier longitudinally andtransversely of said grinding device comprising a rod arranged forturning and sliding movement on said guideway, and an arm rigidlysecured on said rod and articulated with said carrier.

4. A grinding machine, having in combination, a grinding device and acarrier mounted for movement across the acting face of the grindingdevice and for sliding movement to and from operative relation with saidacting face and blade holders mounted upon the carrier upon oppositesides of the grinding device arranged to present the tools in saidholders to the grinding device.

5. A grinding machine, having in combination, a rotary grinding wheelmounted upon a suitable base, a plate mounted on said base for slidingmovement in a direction transverse to the aXis of said grinding wheel, aguideway supported upon said plate, a carrier for the tools to be groundmounted upon said guideway for movement longitudinally and transverselythereof, a rod arranged for turning and sliding movement on saidguideway, and means carried by said rod arranged to impart reciprocatingmovement to said carrier across the acting face of said grinding deviceand sliding movement to and from operative relation with said actingface.

6. A grinding machine, having in combination, a grinding device and ablade holder for supporting a tool in operative relation with saidgrinding device comprising an inclined base plate having at its lowerend an upwardly extending projection for engaging the side of a tool anda flange extending from the said projection arranged to overlap saidtool, a clamping plate arranged to hold said tool in engagement with thebase plate and provided with a depending flange arranged to hold saidtool in engagement with said projection on the base plate.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM A. BOND.

Witnesses:

ALLAN H. BARROWS, BERNARD BARROWS.

